What is a 'system boundary'?

A 'system boundary' refers to the limit that defines what components and functionalities are included as part of the system and what elements are considered external to it. This concept is crucial in systems analysis and design because it helps in identifying the system's scope, understanding what is within the system (such as processes, data, and resources) and what is outside it (like external systems, users, and environmental factors).

Clearly defining the system boundary ensures that designers and analysts can focus on the relevant requirements and interactions, facilitating the development of a coherent and functional system. It acts as a guideline for what needs to be considered during the analysis process, helping to prevent scope creep and ensuring that all stakeholders have a shared understanding of the system's limits.

The other choices do not accurately reflect the meaning of a system boundary. The distinction between user roles and permissions, the user interface layer, and sections related to data storage pertain to different aspects of a system's architecture and functionality, rather than the crucial demarcation of what constitutes the system itself.